If 6cos2θ + 7sinθ – 8 = 0, 0° < θ < 90°, then find the sum of all possible values of cosecθ.
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quadratic is cosectheta sum =-b/a
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raghavsarmukad:
What u have done in 2nd step
How 1-2sin^2 theta as it was cos^2 theta=1-sin^2theta only
cos2theta=cos^2theta-sin^2theta=1-2sin^2theta
It's not cos2 theta, it's cos^2 theta :p sry my typo
Pls Answer it again
keep a pic bro
done
mark as brainliest bro
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