Question
An Assertion (A) and a Reason (R) are given below.
Assertion (A): Clothes are not washed properly in hot water. Reason (R): Hard water contains many minerals. Choose the correct option.Solution
Clothes are not washed properly in hard water because it does not form lather with soap. However, it is true that hard water contains many minerals.
Simplify the following trigonometric expression:
14 tan 25° cot 65° ā 6 cos 39° sec 51°- Find the value of sin²10° + sin²80° + cos²15° + cos²75°.
If asinx +b cosx = c then find the value of acosx - bsinx =?
- If sin(A + B) = ā3/2 and cos(A + 2B) = 0, where 0° < A, B < 90°, then find the value of tan(2A).
- If cot A = ā3, then what will be the value of cosecā“ A?
Find the value ofĀ `1/2` Ā cosec 10Ā Ā -Ā `2/(cosec 70)` Ā ?
Find the Value of Sinā¶`Theta` Ā + Cosā¶`Theta` Ā + 3Sin² `theta` Cos²`Theta`

If ā3āÆtanāÆx = 3, then the value of x:
If (sinθ+cosθ)/(sinθ-cosθ) = 2, then the value of sin4 θ is