Error "exit status 1"

I have an Arduino Uno and a GY-521 accelerometer. The accelerometer and connections work along with the initial code I’m basing everything off of.

I’m using this code:

But, I want to convert the units of the gyroscope and accelerometer to degrees and m/s. To convert the gyroscope into degrees I am doing (int gyx=((gyro_xasin)(180/PI));). The problem is, I am getting this error:
exit status 1
invalid operands of types ‘int16_t {aka int}’ and ‘double(double)’ to binary ‘operator*’

I’m sure this is a pretty easy solution, I am just relatively new to this.
My full code is below and I have things commented out for ease of problem solving.
Thank you so much in advance!

// (c) Michael Schoeffler 2017,
#include “Wire.h” // This library allows you to communicate with I2C devices.
const int MPU_ADDR = 0x68; // I2C address of the MPU-6050. If AD0 pin is set to HIGH, the I2C address will be 0x69.
int16_t accelerometer_x, accelerometer_y, accelerometer_z; // variables for accelerometer raw data
int16_t gyro_x, gyro_y, gyro_z; // variables for gyro raw data
int16_t temperature; // variables for temperature data
char tmp_str[7]; // temporary variable used in convert function
char* convert_int16_to_str(int16_t i) { // converts int16 to string. Moreover, resulting strings will have the same length in the debug monitor.
sprintf(tmp_str, “%6d”, i);
return tmp_str;
void setup() {
Wire.beginTransmission(MPU_ADDR); // Begins a transmission to the I2C slave (GY-521 board)
Wire.write(0x6B); // PWR_MGMT_1 register
Wire.write(0); // set to zero (wakes up the MPU-6050)
void loop() {
Wire.write(0x3B); // starting with register 0x3B (ACCEL_XOUT_H) [MPU-6000 and MPU-6050 Register Map and Descriptions Revision 4.2, p.40]
Wire.endTransmission(false); // the parameter indicates that the Arduino will send a restart. As a result, the connection is kept active.
Wire.requestFrom(MPU_ADDR, 72, true); // request a total of 72=14 registers

// “<<8 |;” means two registers are read and stored in the same variable
accelerometer_x =<<8 |; // reading registers: 0x3B (ACCEL_XOUT_H) and 0x3C (ACCEL_XOUT_L)
accelerometer_y =<<8 |; // reading registers: 0x3D (ACCEL_YOUT_H) and 0x3E (ACCEL_YOUT_L)
accelerometer_z =<<8 |; // reading registers: 0x3F (ACCEL_ZOUT_H) and 0x40 (ACCEL_ZOUT_L)
temperature =<<8 |; // reading registers: 0x41 (TEMP_OUT_H) and 0x42 (TEMP_OUT_L)
gyro_x =<<8 |; // reading registers: 0x43 (GYRO_XOUT_H) and 0x44 (GYRO_XOUT_L)
// gyro_y =<<8 |; // reading registers: 0x45 (GYRO_YOUT_H) and 0x46 (GYRO_YOUT_L)
//gyro_z =<<8 |; // reading registers: 0x47 (GYRO_ZOUT_H) and 0x48 (GYRO_ZOUT_L)

// print out data
Serial.print("aX = “); Serial.print(convert_int16_to_str(accelerometer_x));
Serial.print(” | aY = “); Serial.print(convert_int16_to_str(accelerometer_y));
Serial.print(” | aZ = “); Serial.print(convert_int16_to_str(accelerometer_z));
// the following equation was taken from the documentation [MPU-6000/MPU-6050 Register Map and Description, p.30]
Serial.print(” | tmp = “); Serial.print(temperature/340.00+36.53);
int gyx=((gyro_xasin)(180/PI));
// Serial.print(” | gX = “); Serial.print((gyxasin)(180/PI));
// Serial.print(” | gY = “); Serial.print(convert_int16_to_str(gyro_y));
// Serial.print(” | gZ = "); Serial.print(convert_int16_to_str(gyro_z));
// Serial.println();

// delay