SN Dey Class 11 Chapter Solutions. Compound Angles VSATQ. Solutions of Trigonometric Ratios of Compound Angles Very Short Answer Type Questions
Ex 1(i): Find the Value of
sin(-75°)
Solution:
Ex 1(ii): Find the Value of
cos15°
Solution:
Ex 1(iii): Find the Value of
tan(-105°)
Solution:
Ex 1(iv): Find the Value of
sec(-75°)
Solution:
Ex 2(i): Prove that tan75° – cot75° = 4 sin60°
Solution:
Ex 2(ii): Prove that cosα + cos(120°+α) + cos(120°-α) = 0
Solution:
Ex 2(iii): Prove that tan35° + tan10° + tan35° tan10° = 1
Solution:
Ex 2(iv): Prove that tan8α – tan5α – tan3α = tan8α tan5α tan3α
Solution:
Ex 2(v): Prove that tan43° = $\dfrac{\cos 2^\circ-\sin 2^\circ}{\cos 2^\circ+\sin 2^\circ}$
Solution:
Ex 2(vi): Prove that tan62° = 2 tan34° + tan28°
Solution:
