Month: March 2020

+2 Formula for sin a x sin b [formula for the product of sines] +2

+1 The formula for sec (-a) [formula for the secant of minus a] +1

0 The formula for csc (-a) [formula for the cosecant of minus a] 0

0 The formula for tan (-a) [formula for the tangent of minus a] 0

0 The formula for cot (-a) [formula for the cotangent of minus a] 0

+1 The formula for sin (-a) [formula for the sine of minus a] +1

+1 The formula for sin (-a) [formula for the sine of minus a] +1

+1 The formula for tan (a + b) [formula for the tangent of sum] +1

+1 The formula for tan (a – b) [formula for the tangent of difference] +1

+1 The formula for csc (The formula for the cosecant) +1