Post-UTME Mathematics 2016 Objective — Question 58
Question 58 of 60 from the Post-UTME Screening (Post-UTME) Mathematics 2016 Objective paper, with the correct answer and a full explanation.
Advertisement
Trigonometry 8. For all θ, sinθ + sin(-θ) + cosθ + cos(-θ) + tanθ + tan(-θ) = ?
- B. 2cosθCorrect
- C. 2tanθ
- D. 2sinθtanθ
Explanation
sin(-θ)=-sinθ and tan(-θ)=-tanθ cancel their positive counterparts, leaving cosθ+cos(-θ)=2cosθ.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.