If x + y = 90 simplify \((sinx + siny)^2\)−2sinxsiny

A man with an annual salary of N2000, has allowances of N600. If Income Tax is 5%. How much income tax expenses does he pay each year?

Solve the equation \( 3x^2 − 4x − 5 = 0 \)

The first and last term of a linear sequence (AP) are 6 and 10 respectively. If the sum of the sequence is 40. Find the number of terms

Find the equation of a line which is form origin and passes through the point (−3, −4)